Automatic trip device



May 3, 1932'. A. RAsMussl-:N ET AL v. 1,855,402

AUTOMATIC TRIP DEVICE Filed Feb, 2o, 1928 z/ za Z Y l l @ma @PWM TORNEYS.

Patented May 3, 1932 UNITED STATES PATENT OFFICE ANDREW RASMUSSEN AND WILLIAM S. GOODELL, F RACINE, WISCONSIN AUTOMATIC 'mir DEVICE Application filed February 20, 1928. Serial No. 255,666.

15. provide an automatic trip device which may be used on barbecue machines having a tire proof curtain, the trip device being adapted to automatically release said curtain when an exigency arises which makes it necessary to insulate the pieces of meat from the fire.

Itis a further object of this invention to provide an automatic trip device which is simple in construction and operation, and :welll adapted for the purpose described.

With the above and other objects in view, theinvention consists ofthe improved automatic trip device, and all its parts and combinations'as set forth in the claims, and all equivalents thereof.V n ..30 In the accompanying drawings, in which the same reference characters designate the same parts in all of the views:

Fig. l is a side elevation of the improved automatic trip device, parts being broken away, and parts being shown in section;

Fig. 2 is a sectional view on line 2 2 of Fi 1 FigS is a sectional view on line 8 3 of Fig. 1, showing the position of the parts 11.40 when the machine is rotating at a high speed;

and

Fig. 4 is a similar sectional view showing the lposition of the parts when the machine is rotated at a very slow speed or is not ro- ,1145 tated at all.v

@o shaft 11 is j ournaled in the bushing, and has the shaft by means of a a pulley 12 secured to one end, and a governor member 13 secured to its other end. Secured to the upper part of the bearing member by bolts 14 is one sion l5.

end of an eXten- The extension 15 is provided with a portion 16 extending at right angles, and having a bifurcated lower end.

The upper end of the portion 16 is provided with 1n. bore.

Within the bore is a a projection 17 yhaving a bore 18 there- An opening 19 is in connection with the pin or kreleasable member 2O having an annular shoulder 21 formed in its lower end.

An upward force (not shown) is being exerted upon the pin, and it is normally held against upward movementby the engagement of one end of a bell crank lever 22 with the shoulder 21. The bell crank lever is pivoted at 16, and it is engaged by a normally holds it The bifurcated lower 16 has bores 25 23 to the member spring 24 which in locking position.

end of the portion therein, within which are insulated bushings 26. Journaled within the bushings is an actuating pointed end 28. Between th of the portion 16, is an mounted on the two nuts which are thread rod 27 having a e bifurcated ends insulated disk 29 rod 27, and held between ed on the shaft.

Adjustment nuts 30 limitr the inward movement of the rod. The disk the lower end of the bell 29 bears against crank lever 22, and is adapted to move the latter out of engagement with the shoulder 2l to release the pin upon outward movement of the rod 27.

The governor member tends. The

13 has a central bore 31 within which one end of the' shaft 11 exgovernor is held rigidly upon set screw 32. The

governor is formed with an enlarged hollowed out portion 33 withi 34 is pivote 35 on one side, and on the n which an arm The armv 34 has a weight other side has a beveled extension 36 which is adapted to slide under the pointed end 28 of the rod 27 to cause the rod to move outwardly. The arm is normally held by the spring 38, so as to cover the space 37 in the bore the end'of the ever, upon rotation of the consequent rotation of th 31 to prevent rod 27 from entering it. Howshaft 11, and a4 e governor, the

. outwardly to' ..dotted linesin move the bell crank-lever out Vof engagement In the case of a barbecue machine, the in connection with an asbestos curtain, and automatically releases it to prevent its weight on the arm 34 causes the latter to swing outwardly by centrifugal force, thereby exposing the opening and allowing the point of the rod 27 to enter it. When the speed of rotat-ion is decreased, or when rotation stops altogether, the centrifugal force will'no longer overcome thetension ofthe spring 38, and the beveled edge -36fwill slide under the point of the rod 27 and. force. the latterout of the opening. ,Y (Seelig. 4.)

'llheope'r'ationAV of a normal speed, the

as shown in Fig. 3. The bell crank lever -fis engaging the shoulder of the pin 2 0, and -lis preventing its arm -35 of the governor is as shownfinllig. v3,4`thrown out by centrifugal force against upward movement. The

the tensionl o f the spring 38,' and exposingther 1 topening 37. The point of the rod 27 is linthe if through-some mishap or opening. Now,

speed of rotation of the shaft other cause, the

Al1` is kreduced very much, or if lthe shaft has `stopped rotating, there willeither be no centrifugal force acting upon the'arm 34, or else it will beso small as not to overcome the force Vexertedby lthe springv 38, which will e draw the arm f inwardly,

y36 to slide under the as shown inFig. 4.

allowing the bevel point 28 of the rod 27,

' the position shown by the Fig. 1,causing the disk 29 to with the shoulder ofthe pin 20. The pin twill then moveupwardly inthe direction of -the force exerted upon it. The pin may be in connection with any safety device desired. pin is the meat is so slow the mechanismturning the meat burning.

that*v there `is danger of A WhenY such is the case', the automatically lowered curtain'insulates the meat from the lire being scorched. An electric bell or othersignal 39 is used in connection with 'the- The other end is securedto a portion of the l frame ofthe device such Vas the bolt 14. lWhenever the speed of rotationr of the shaft 1l is so decreasedas to cause the arm 35 to engage ythe end ofthe pin 27, the contact to the signal will be completed, and a warning will v Y ybe 'given at the same time that the automatic releasetakes place. V

@It yis not desired 4invention to any-particular adaptation, Aas the broad concept contemplates the nse of to limit the scope the devicey on machines generally. f

fes

iis, simple in construc F rom the foregoing description it may be the' device is'as follows Assuming that the shaft 1l isrevolving at.

parts will bein'the p'osi tions shown by the fullA lillesinliggl and Y 3. A'trip device'comprising a frame, areleasable' member,-a bell' crank leverk for en- 'aY pointed This willv push the rod when'the speedl of jturesf Y tion and operatiornand Well1 adapted for the purpose. described. n

What we claim is': Y

1. The combination with a releasable inember, of a trip device therefor, comprising a frame, means on said frame normallyengaging said releasablemember, actuating mechanism engaging said means, a rotatable memonsaid rotatable member having an opening therein, and a centrifugally operated arm on thegovernor regulating the admission of'a 'portionfof the*actuatingmechanism Atothe opening in the governor.

` 2. A trip' device comprising a frame, a releasable member, `means of said frame for engaging said releasable member, actuating mechanism vengaging said-meansfa' rotatable member in connection with the frame,

1agovernor having an opening tliereinon said rotatable member, a centrifugallyoperated arm pivotedY on beveled portion for engaging aportionof -the actuatingmechanism,and. yielding means A for eXerting'a force on thelarm in a direction opposite to the centrifugal force.

saidfreleasable member, yielding said bell Vcrank lever in an actuating rod having means for holding engaging position,

the Vframe,a disk on the rod engaging the bell crank Vlever, va-,rotatable memberv in connec' tion withthe frame, a :governor having -an opening therein on the rotatable member, a

centrifugally-'operated arm pivotedV onV the governor and having l a beveled portion for engaging the. pointed innerend of the actuating /rodyand `yielding means for exerting a vforce on thejarmin a direction opposite,` tothe centrifugal force. o Y In testimonyY ywhereof we' aliix our ysignao ANDREW Y nAsMUssnN; o 'v ,WILLIAMv s. .Goonnnn device. .'Onev wire l fromthe signalv is attached to the rod 27.

the governor and having a" inner end slidably positionediulber in connection with said frame, agovernor iio 'fils if uns Y A seen thatthe improved automatic trip device 

